utils.py 文件源码

def request_file(link, outfile, force_rerun_flag=False):
    """Download a file given a URL if the outfile does not exist already.

    Args:
        link (str): Link to download file.
        outfile (str): Path to output file, will make a new file if it does not exist. Will not download if it does
            exist, unless force_rerun_flag is True.
        force_rerun_flag (bool): Flag to force re-downloading of the file if it exists already.

    Returns:
        str: Path to downloaded file.

    """
    if force_rerun(flag=force_rerun_flag, outfile=outfile):
        req = requests.get(link)
        if req.status_code == 200:
            with open(outfile, 'w') as f:
                f.write(req.text)
            log.debug('Loaded and saved {} to {}'.format(link, outfile))
        else:
            log.error('{}: request error {}'.format(link, req.status_code))
    return outfile